Concept information
Terme préférentiel
UV Ceti star
Définition(s)
- A UV Ceti star is a red or orange emission-line dwarf (spectral type dMe or dKe) that is also eruptive variable; also known as a flare star. Within seconds the star may brighten by up to 6 magnitudes, then decline, rapidly at first, then more gradually to a preflare level after several minutes or hours. An increase in radio and X-ray emission accompanies the optical outburst. The flare activity is similar to that found on the Sun but appears comparatively more dramatic because of the normal faintness of red/orange dwarfs. UV Ceti itself is a faint M6eV dwarf that is part of a red dwarf binary system (the B component Luyten 726-8). The two members are of nearly equal brightness (visual magnitude 15.3 and 15.8) and orbit one another every 26.5 years. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/U/UV_Ceti_star.html)
Concept(s) générique(s)
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/MDL-RM998SMS-3
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